Friction draft-rigging.



J. F. oooNNoR.

PRIGTION DRAFT RIGA'IlTG.

APPLICATION FILED MAY 20, 190B.

913,759. Patented Mar. 2, 1909.

2 SHEETS-SHEET 1.

WITNESSES IN VEN TOR J. F. OGONNOR.

FBIGTION DRAFT RIGGING.

APPLICATION FILED MAY 20, 1908.

91 3,7159. Patented Mar. 2, 1909.

2 SHEETS-SHEET 2.

WITNESSES: IN VBN TOR /f/'g ATTORNE v5 UNITED sTATEs PATENT OFFICE.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO W. H. MINER COMPANY, OF CHICAGO,

i ILLINOIS, A CORPORATION OF ILLINOIS.

FRIGTION DRAFT-RIGGING.

Specification of Letters Patent.

Patented Mamh g, 1909.

Application filed May 20, 1908. Serial No. 433,813.

cago, in the county of Cook and State of- Illinois, have invented a new and useful Improvement in Friction Draft-Rigging, of which the following is a specification.

My invention relates to improvements in draft rigging.

It consists, in connection with the draw bar, followers and cooperating spring and friction shell and friction block cushioning devices, of a slotted wedge and a transverse stop secured to the friction shell and extending through the slot of the Wedge and servingto hold the spring normally under an initial load or tension, and thus to automatically take up wear of the friction devices and cause all the parts to always be in snug-'contact ready for eflicient 4cushioning action, the same serving also to liold the friction shell, spring, friction blocks wedge and the anti-friction rollers interposed between the wedge and friction blocks all `properly assembled together.

My invention further consists in the novel construction of parts and devices and 1n the novel combinations of parts and devices herein shown and described.

In the accompanying drawing, forming a part of this specification Figure l is a. side elevation, partly in section, on line l-1 of Fig. 2 of a friction draft rigging embody-' ing 'my inventiong- F ig. 2 is a plan view, part-ly in section, on line Q-2 of Fig. l; Fig. 3 is a cross section on line 3 3 of Fig. l; Figs. 4f, 5 and (3 are detail side, end and plan views, respectively, of one of thc friction blocks; Figs. 7, 8 and 9 are detail side, end and plan views, respectively, of the wedge.

In the drawing represents the center sills or draft sills of the car, A the front sill, B the draw bar, B1 the draw bar yoke,

(l the side platesl or stop castings having front, rear and intermediate stops C1 O2 C C4 for the followers to abut against, E El the springs in line with the draw bar, F a longitudinally movable friction shell having an internal friction face f, F1 F1 friction blocks" havingexterior frictioufaces fl and inclined or wedging faces ff furnished with retainin shoulders f3.

G is the Wedge. It has two inclined faces furnished With stationag shoulders g1 for the lanti-friction rollers which are interposed between the wedge and friction blocks and each of which rollers has a rolling action on both the Wedge and adjacent friction block to enable the friction devices to properly release.

The Wedge has a guide and stop slot g2 to receive a transverse pin or bolt H1L which extends diametrically through the friction shell F and is removably secured thereto by a threaded nut L. The slot g2 is preferably formed in a loo J-like extension g3 with whlich the wedge (LJ is provided at its inner ent.

The friction blocks F1 F1 are provided at their inner ends with central slots or recesses 7'* to receive the extensions g3 of the wedge G.

The friction shell F is provided at its rear end with an inwardly projectingshoulder or flange ff'4 to engage the external flange or shoulder L on the preliminary compression block or follower K, which is interposed between the rear follower D1 and the springs E El to provide for a preliminary cushioning action of the springs before the friction cushioning devices F, F1 F1 are brou ht into action, in order to thus more eifectua ly bsorb and cushion light strains on the draw The slotted wedge G coperating with the transverse guide and stop pin or bolt H enables the friction shell and Wedge to have the necessary longitudinal movement in respect to each other, and at the same time hold the spring or Sprin s under an initial compression of preferab y about one-half inch, or sufficient to automatically take up or compensate for all wear of parts and prevent lost motion and to cause the friction devices to properly operate and exert an efiicient cushioning action throughout the whole extent of the movement of the draw bar, excepting of r mrse for the limited initial movement thereofdue to and provided for by the preliminary compression follower or block K. The slotted wedge Gand transverse bolt H also serve to hold all the cushioning` devices assembled together in cooperative relation with each other within the friction shell F, so that they cannot become disarranged or lost when the draft rigging is being removed from or replaced in the car, which is of convenience and saves time, and is thus of great practical advantage.

M M are the tie plates which support the draft. rigging on the center sills o the car,

they are removably secured in place by bolts m.

1n assembling the parts the block K is first laced within the shell F then the springs E1, then the friction hlocks F1 F1 and wedge Gr then the springs E E1 are initially compressed say one-hal to enable the stop in H to be inserted through the slot g2 of) the wedge G.

I claim:

l. In a friction draft ri ging, the combination with a lfriction shel of a sprin and friction blocks within the shell, and a s otted Wedge and transverse pin extending through inch, or sufficiently vthe wedge to hold the spring under an initial compression, substantially as specified. l 2. ln a friction draft rigging, the combination with a friction shell, of a sprin and friction blocks within the shell, a slotted slaves Wedge and transverse pin extending through the wedge to hold the spring under an initial compression, and said Wedge having an extension through stantially as specified.

3. ln a friction draft rigging, the combination with a friction shell, of a spring and friction Vblocks Within the shell, a slotted wedge and transverse pin extending through the Wedge to hold the spring under initial compression, said Wedge having an extension through which its slot extends, and said friction blocks having recesses to receive said extension of the Wedge, substantially as speeiied.

JOHN F. OCONNOR.

Vitnesses: EDMUND Anooon, H. M. MUNDAY.

which its slot extends, suh- 

